Welcome!

geese howard,
I've tweaked the volume a little on Golden Axe, please give another try

With the 2 afterburner II states you've attached, it appears to be working fine: the puff of smoke appears when it powers down engine on landing, then it goes away.  You're saying the smoke never goes away on your screen?

best regards,
- dink

barbudreadmon, any emulation that uses the f3 sound system might be slower than usual, which is why I noticed the problem right away.
There is a setting that will put the music at its normal speed, if something is off. (see commit)  There's a rather long story why it ended up this way, and it's all mr. B's fault. 

best regards,
- dink

See video of the arcade version.

As far as i could tell using a translator, there is nothing on that page saying that video came from pcb.

Hi geese howard,
Recently they (MAME) added a filter to the upd7759 (pcm/voice chip) which softens the sound a little, it certainly sounds nicer and less harsh.  I'll try to add something similar.

I played the first stage of Afterburner II, at the end & after I land, the jet powers down its engines and a big puff of smoke appears, but then it goes away as it should.  Is it happening somewhere else?  Can you attach some savestates from right before it happens?  Are you using a current version from the usual place?

best regards,
- dink

I ll try golden axe soon, thanks!!

After burner 2 - it happens in other stages that the airplane land , like ending scene.
I can send you save states tomorrow, and i m using latest builds.

Added the support to 10 new ZX Spectrum homebrews:
Booty the remake v1.2 (2019)
Booty the remake - Black Edition v1.2 (2019)
Ganimedes (2023)
Laetitia Part 1/2/3/4 (2019)
Maze Death Rally-X (2018)
Micro Profanation v1.1 (2022)
Misifu la Gatita (2019)
O-Puzz Attack (2018)
PTM (2021)
Rogue (2019)